Question about text messages (if you know!)

Ok, on this site we have many ppl who know about technology...I don't..lol
This is the problem: one of my best friends has a bf and he's supposed to be in Cyprus on business. He hasn't called her from there but texts her all the time.
Her question is, if he's in Cyprus, wouldn't she see some code in front of his number? Cyprus is a foreign country, after all. His number is the same like when he texted her from Greece.
PS She's worried that he's still here and cheating on her

Ok, on this site we have many ppl who know about technology...I don't..lol
This is the problem: one of my best friends has a bf and he's supposed to be in Cyprus on business. He hasn't called her from there but texts her all the time.
Her question is, if he's in Cyprus, wouldn't she see some code in front of his number? Cyprus is a foreign country, after all. His number is the same like when he texted her from Greece.
PS She's worried that he's still here and cheating on her